和歌山県飯盛鉱山産ferri-ghoseite

坂野 靖行; 門馬 綱一; 宮脇 律郎; 山田 滋夫

doi:10.14824/jakoka.2018.0_32

2018 Annual Meeting of Japan Association of Mineralogical Sciences

Session ID : R1-08

DOI https://doi.org/10.14824/jakoka.2018.0_32

Conference information

Host: Japan Association of Mineralogical Sciences

R1: Characterization and description of minerals

Ferri-ghoseite from the Iimori mine, Wakayama Prefecture, Japan

*Yasuyuki Banno, Koichi Momma, Ritsuro Miyawaki, Shigeo Yamada

Author information

Keywords: amphibole, ferri-ghoseite, clino-suenoite, magnesio-riebeckite, solid solution

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Ferri-ghoseite was found from the Iimori mine, Wakayama Prefecture, Japan. Its chemical formula for an X-ray study is ^A(Na_0.16K_0.02)_Σ0.18^B(Na_0.83Ca_0.09Mn²⁺_1.08)_Σ2.00^C(Mg_3.78Mn²⁺_0.52Fe³⁺
_0.66Al_0.04)_Σ5.00^T(Si_7.95Al_0.05)_Σ8.00O₂₂^W[(OH)_1.90F_0.10]_Σ2.00, based on electron microprobe analyses. Single crystal X-ray diffraction study gave the following unit cell parameters: a = 9.6389(7), b = 18.0534(10), c = 5.3138(3) angstrorm and beta = 102.896(2) degree.

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